Improvement in apparatus for preparing parchment or water-proof paper



identit gitana @wat n. P. HUDSON, orv NEW tonie Y., AssioNOi-t 'ro Nn\v' YOiu Warne PROOF PAPER COMPANY, OIT-Naw YORK errer.

Letters Patent No. 107,686, dated September 27, 1870.

The Schedule referred to iu these Letters Patent and making part of the same.

To all whom 'iL Vmay concern 'Be it known that I, El. Monson', ot the. city, county, and State of New York, have invented an Improvement in Apparatus for Preparing an iniproved Water-Proof Material from ifapcr; and l do hereby declare that the following is a t'nll and exact description thereof, reference being had to the accompanying drawing making part ol' this specification* Figure 1 beingl a plan of the principal part ot' the apparatus to which my improvement belongs, sullicient to show its operation.

Figure 2, a longitudinal vertical section thcreol'.v

. Like letters designate corresponding parts in both figures.

I will tirst describe the general I'eatures oi' the whole apparatus.

The body ot' this apparatus may he ol` any suitable rand convenient forni, as represented, or Otherwise,

and of a wdtli sufficient t'o opende upoli the widest rolls of paper required. 1t eonsistsola series ot' couipartnicnts or troughs, B G l) .ll ti ll i, for containing the various solutions and baths to which the paper is subjected in the process.

Over the partitions between the several compartments, respectively, are pairs oi' squeezing-rollers I; b, fj', It lr, 'in m, o o, and 1. t, between which the roll, a', of paper successively passes, 4and is subjected to the required pressure.

The lower i'ollcr ot' each pair is4 revolved h v any suitable means, at t-lic proper spcc'il, and in ilie re quired direction, to pass thc paper through the apparatns at the desired rate ot' movement. '.llic. niotionsof all the rollers should be unii'orm. lhe upper rollers are. pressed down upon the lower rollers by springs Ot' proper strength, or other means. lhe location oi'eacli pair ot' rollers is not directly over the partition below, but always a little to one. side, as represented, toward the direction ii'oin which the v paper moves, in order that the liquid ol' cach bath,

ti'oni which the paper rises as it is expressed, may fall back into the. saaie hath, and not be carried over into the next bath, and be mixed therewith.

Near the bottom of'each compartment is located a friction-roller, d, y, 1.', n, r, or u, down around which the paperroll passes, as indicated, in order to immerse itin the baths.

The other parts ot' the apparatus are special to sncecssive steps ot' the process, and will be best described in connection therewith.

rlhe roll ir, ot' paper, irst coln'es i'roin a roller or reel, and passes down into the bath oi' two vohnnes of' iulphurie acid and one ot' water, and rims under a iietioirroller in the bath, or prctcrably, (tor sonic nrposes,)`between a pair of.' squeezingrollers, a sf, as lt)\\'ll.

Since-the acid-bath is required to lie kept at `a t-enqieratnre ot' (5()o Fahrenheit, or closely approxihinting thereto, and since the passage of the paper through it continua-ily raises its temperature, I pro' vide t'or regulatingl the tempera-turc accordingly, and the nature ol' my invcntionconsists in surrounding the acid-hath with acooling hath, provided with ice or other cooling nntterial.

l hohl theaeidin aleaden trough or vessel, A, which rests a hath oi' icc-watm', or its equivalent, in thc'coinpart-nient li, i\iid rnealh. liy gradually adding ice in the compartment .It thc temperature, with proper care, can he kept at; the degree required. A ther lnionieter may he permanentlysituated in the hath, to indicate thc temperature-at all times.

".lhc roll te, l'rom the acid-bath, passes upward lietwcen the squeezingLrollers b b, by which niuch ot" the arid is separated thcrei'roni and returned to the bath. lt then descends into a bath of clear water in the compartment C, the water properly circulating through it, so as not to become gradually charged with thc acid in the paper; and, in order that the washing may be. as complete and etleetual as possible, l, here add the. shower'bath to the ininiersi-ng-hath.

lo cil'ect this, the roll, as it descends into the conipartmcnt, passes between two (or more) water-pipes e e, having numerous tine periorations, a; a, in the side toward the paper, through which numerous small jets oi' water are thrown against the paper with force produced by pressure on the water in the pipes.

Then, as the. pape aseends from the water-bath, it may pass again between perforated water-pipes, c c, and receive another washingr therefrom.

The roll ot' paper then passes between 4the squeezing-rollersj'f, (or over a single roller would answeiin this case,) and descends into the eon'ipartnicnl; l), where itis immersi-.d in a hath ot' dilute aqua ammonia.

Again, the roll asccnds and passes het-weon tho squeezing-rollers )i li, and is there deprived ot much ot' the aininonia-water.

',llicnce it desends into another water-bath in thcl compartment 1*),passing between shower-pipes i 'i and ll, as in the. compartment-t, t'o wash out the ammonia.

'l.`hcncc, atte-r passing between the rollers ne. m., (or over a single. i'riction-rolle it descends into the compartment; G, to lieinniicrsed in a bath oi dilute limewater, which completes the neutralization of' the acid in the paper.

Alter this the roll passes between the squeezingrollers o o to exprcssthe linie-water, and thendeseends into the compartment-l lrl, where it is washed, as in compartments U and E, passing` between sprinklingpipes, p p and s a, as before.

Finally, after passing between the rollers tt, (or

over *L l `l;.ciwrrollei,') the roll descends into the compartment I, .in which it receives :u bath of. glycerine, :recording to the process described i'n n. previous application for Letters la'tent mande hy' me. .lhcnce -tl1e roll ascends, to be wound on ai reel or spread ont;

pipes, as set fort-h in'Letters Potent',` granted to Stuart; Gwynn, March 23, `1869. v

'What l claim as my invention, and desire to secure hy Letters Patent, is-

rThe cooling-bath B, m'onnd the :reid-bath A, for-= the purpose herein specied.

lll. l. HUDSON.

4'Witnesses-z Jos. BROWN, EDM. F. BROWN. 

